How do you check obd1 codes for Toyota Cressida 1986?

To check OBD1 codes for a 1986 Toyota Cressida, first locate the diagnostic connector, which is typically found near the driver's side under the dashboard. Use a jumper wire to connect terminals TE1 and E1 on the connector. Turn the ignition to the "ON" position (do not start the engine), and the check engine light will blink the trouble codes in a sequence. Count the blinks to identify the codes, and refer to a service manual for their meanings.